init

Source/PresetManager.cpp

@@ -0,0 +1,134 @@
+#include "PresetManager.h"
+#include "PluginProcessor.h"
+
+PresetManager::PresetManager(FDNReverbAudioProcessor& p)
+    : processor(p)
+{
+    refreshPresetList();
+}
+
+// -----------------------------------------------------------------------------
+// filesystem
+// -----------------------------------------------------------------------------
+juce::File PresetManager::getPresetsFolder() const
+{
+    auto folder = juce::File::getSpecialLocation(
+        juce::File::userDocumentsDirectory)
+        .getChildFile(kSubFolder);
+    if (!folder.exists())
+        folder.createDirectory();
+    return folder;
+}
+
+juce::File PresetManager::getPresetFile(const juce::String& name) const
+{
+    return getPresetsFolder().getChildFile(name + kExtension);
+}
+
+void PresetManager::refreshPresetList()
+{
+    presetNames.clear();
+    auto files = getPresetsFolder().findChildFiles(
+        juce::File::findFiles, false,
+        juce::String("*") + kExtension);
+    files.sort();
+    for (const auto& f : files)
+        presetNames.add(f.getFileNameWithoutExtension());
+}
+
+// -----------------------------------------------------------------------------
+// save
+// -----------------------------------------------------------------------------
+// reuses PluginProcessor::getStateInformation() directly,
+// so no PluginProcessor changes are needed.
+// -----------------------------------------------------------------------------
+// --- after changes ---
+bool PresetManager::savePreset(const juce::String& name)
+{
+    if (name.isEmpty()) return false;
+     // * fix: notify the Processor of the name before getStateInformation()
+     // so getStateInformation() writes the correct name into the ValueTree
+    processor.setLastSavedPresetName(name);
+    juce::MemoryBlock data;
+    processor.getStateInformation(data);
+
+    auto file = getPresetFile(name);
+    if (!file.replaceWithData(data.getData(), data.getSize()))
+        return false;
+
+    currentPresetName = name;
+    refreshPresetList();
+    if (onPresetListChanged) onPresetListChanged();
+    if (onPresetLoaded)      onPresetLoaded(name);
+    return true;
+}
+
+// -----------------------------------------------------------------------------
+// load
+// -----------------------------------------------------------------------------
+// reuses PluginProcessor::setStateInformation() directly.
+// setStateInformation() sets paramsNeedUpdate=true, so
+// the next processBlock() sends the new parameters to the engine.
+// -----------------------------------------------------------------------------
+bool PresetManager::loadPreset(const juce::String& name)
+{
+    auto file = getPresetFile(name);
+    if (!file.exists()) return false;
+
+    juce::MemoryBlock data;
+    if (!file.loadFileAsData(data)) return false;
+
+    processor.setStateInformation(data.getData(), static_cast<int>(data.getSize()));
+
+     // * after loading a preset always normal view (Normal Mode)
+    if (auto* param = processor.apvts.getParameter("promode"))
+        param->setValueNotifyingHost(0.0f);
+
+    currentPresetName = name;
+    if (onPresetLoaded) onPresetLoaded(name);
+    return true;
+}
+
+// -----------------------------------------------------------------------------
+// delete
+// -----------------------------------------------------------------------------
+bool PresetManager::deletePreset(const juce::String& name)
+{
+    auto file = getPresetFile(name);
+    if (!file.exists()) return false;
+
+    if (!file.deleteFile()) return false;
+
+    if (currentPresetName == name)
+        currentPresetName.clear();
+
+    refreshPresetList();
+    if (onPresetListChanged) onPresetListChanged();
+    return true;
+}
+
+// -----------------------------------------------------------------------------
+// navigation
+// -----------------------------------------------------------------------------
+int PresetManager::getCurrentPresetIndex() const noexcept
+{
+    return presetNames.indexOf(currentPresetName);
+}
+
+void PresetManager::loadPrevPreset()
+{
+    if (presetNames.isEmpty()) return;
+    int idx = getCurrentPresetIndex();
+    if (idx <= 0)
+        idx = presetNames.size();
+    loadPreset(presetNames[idx - 1]);
+}
+
+void PresetManager::loadNextPreset()
+{
+    if (presetNames.isEmpty()) return;
+    int idx = getCurrentPresetIndex();
+    if (idx < 0 || idx >= presetNames.size() - 1)
+        idx = -1;
+    loadPreset(presetNames[idx + 1]);
+}